Search for Urban Spaces
Elliptical urban space, Piazza del'Antiteatro, Lucca
This interesting project from Holistic City allows users to search the world for urban spaces of particular shape. For example, it is possible to search for triangular, oval, rectangular etc. open spaces in a number of countries.
To search the map you just select the shapes you are interested in and the countries you wish to search in. The found urban spaces are then listed in the map sidebar. It would be really cool if Holistic City had developed some kind of shape recognition algorithm but I think they have just found and databased the examples themselves. Nevertheless the map will be of interest to anyone with an interest in the use of urban space.